BENSON JETSTREME 4+ - Installation; Location; Conventional Flue

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Int.

Diameter

Height

Volume

40/52

292mm

300mm

0.02M

3

50/70

292mm

300mm

0.02M

3

70/90

375mm

387mm

0.04M

3

95/120

457mm

390mm

0.06M

3

125/140

457mm

390mm

0.06M

3

Table

2

Combustion

Chamber

Size

Location

The

Jetstreme 4+

must

be

located

on

a level

non-inflammable

surface

that

can

withstand

the

weight

of

the

boiler

and

associated

equipment.

The

boiler

location

must

permit

adequate

ease

of

access for

maintenance

and

servicing.

It

is

recommended

that

the

following clearances

should

be

provided:-

Above

the

boiler

600mm

(24 inches)

To

either

side

25mm

(1

inch)

In

front

900mm

(36 inches)

When

choosing

a site for

the

boiler,

the

major

consideration

is

the

provision

of

a

suitable

flue

system

and

whether

a

Conventional

type

flue

or

a Balanced Flue

type

should

be

used.

Consideration

must

be

given

to

the

required

position

of

the

flue, access of

the

oil

supply

from

the

storage

tank,

and

the

location

of

the

air

vents

that

may

be

required.

If

the

boiler

is

to

be

located

within

a

compartment

or

cupboard

then

the

compartment

or

cupboard

must

be

constructed

or

modified

for

the

purpose

intended.

Details

of

these

requirements

are

given

in

BS

6798: 1987 Specification for

the

installation of

Gas

Fired

Hot

Water Boilers

of

Rated

Input

not

exceeding 60 kW.

Conventional Flue

If

the

flue is

on

the

outside

of

the

building

then

the

flue

must

be

of

the

insulated

twin

wall

type

to

eliminate

the

possible

formation

of condensate.

The

flue

should

rise

as

near

vertically

as

possible

to

its

maximum

possible

length

before

any

bends

are

included.

The

number

of

bends

should

be

kept

to

an

absolute

maximum

of

two.

No

bend

should

have

an

angle

less

than

135°.

No

part

of

the

flue

internal

diameter

should

be

less

than

that

of

the

flue

outlet

spigot

diameter

on

the

boiler.

A

brick

chimney

should

be

lined

with

a

suitable

stainless steel flue

pipe,

or

other

suitable

non-

combustible

lining,

with

the

void

between

the

lining

and

the

masonry

filled

with

a

suitable

insulating

material

e.g. vermiculite.

The

chimney

must

always

be

swept

before

the

fitting

of

a liner.

A

draught

stabiliser

must

not

be

used

unless

the

flue

pull

is

found

to

be

excessive.

The

flue

outlet

should

terminate

at

least

600mm

(24 inches)

above

the

apex

of

the

roof, if this is

not

practical,

or

it

is

found

that

the

appliance

is

being

subjected

to

a

down

draught,

then

an

approved

cowl

should

be

fitted to

eliminate

this condition.

The

fitting

of

a

suitable

cowl is

always

recommended.

4